Hi @Opalgeorgie and a very warm welcome to the Community Forum
As @Silversitters mentioned, you will need to contact Membership Services to get this amended. I have attached a similar thread you might like to have a look at.
For reference, as a member, you can also add your TrustedHousesitters profile on to your Forum profile by following the attached link, should you wish. This will then enable others to offer you helpful advice and feedback and will also give your listing extra exposure!